<template>
    <div>
        <!-- 面包屑导航区域 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>

      <!-- 卡片视图区域 -->
      <el-card>
          <!-- 添加角色按钮区域 -->
          <el-row>
              <el-col>
                  <el-button type="primary">添加角色</el-button>
              </el-col>
          </el-row>
            <!-- 角色列表区域 -->
          <el-table :data="roleList" stripe border>
              <!-- 展开页 -->
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <el-row :key="item1.id" v-for="(item1,i1) in scope.row.children"  :class="['bdbottom', i1 === 0 ? 'bdtop' : '','vcenter']">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag closable @close="removeRightsById(scope.row,item1.id)">
                            {{item1.authName}}   
                            </el-tag >
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二级权限和三级权限 -->
                        <el-col :span="19">
                            <el-row v-for="(item2,i2) in item1.children" :key="item2.id" :class="[i2 === 0 ?'' : 'bdtop','vcenter'] ">
                            <!-- 渲染二级权限 -->
                                <el-col :span="6">
                                    <el-tag type="success" closable @close="removeRightsById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                            <!-- 渲染三级权限 -->
                                <el-col :span="18">
                                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightsById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                                </el-col>
                            </el-row>
                        </el-col>
                    </el-row>


                    <!-- <pre>{{scope.row}}</pre> -->
                </template>
            </el-table-column>
              <!-- 角色索引 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column prop="roleName" label="角色名称">
            </el-table-column>
            <el-table-column prop="roleDesc" label="角色描述">
            </el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                    <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
          </el-table>
      </el-card>

      <!-- 分配权限对话框 -->
        <el-dialog
        title="提示"
        :visible.sync="setRightDialogVisible"
        width="50%" @close="setRightDialogClosed">
        <!-- 树型控件 -->
        <el-tree :data="rightslist" :props="treeProps" show-checkbox default-expand-all ref="treeRef" :default-checked-keys="defKeys" node-key="id"></el-tree>
        <!-- 底部 -->
        <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary"  @click="allotRights">确 定</el-button>
        </span>
        </el-dialog>


    </div>
</template>
<script>
export default {
    data() {
        return {
            //所有角色列表数据
            roleList:[],
            //控制分配权限对话框的显示隐藏
            setRightDialogVisible:false,
            //所有权限列表数据
            rightslist:[],
            // 树型控件的属性绑定对象
            treeProps:{
                 children: 'children',
                 label: 'authName'
            },
            // 默认选中的节点ID值数组
            defKeys:[],
            // 当前即将分配角色的ID
            roleId:''
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        //获取所有角色列表数据
        async getRolesList(){
            const {data:res} = await this.$http.get('roles')
            if(res.meta.status!==200){
                this.$message.error('获取角色列表数据失败')
            }
            this.roleList=res.data
            // console.log(this.roleList);
        },
            // 根据Id删除对应的权限
        async removeRightsById(role,rightId){
                  // 弹框提示用户是否要删除
           const confirmResult =await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

            if(confirmResult!=='confirm'){
                return this.$message.info('已取消删除')
            }

            const { data:res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status!==200){
                this.$message.error('删除权限失败')
            }
            this.$message.success('删除权限成功')
            role.children=res.data
        },
        //展示分配权限对话框
        // 获取分配权限数据
        async showSetRightDialog(role){
            this.roleId=role.id

            const { data:res } = await this.$http.get('rights/tree')
            if(res.meta.status!==200){
                return this.$message.error('获取权限列表数据失败')
            }
            // 把获取到的权限数据保存到 data 中
            this.rightslist=res.data

            console.log(this.rightslist);
            // 递归获取三级节点的ID
            this.getLeafKeys(role,this.defKeys)

            this.setRightDialogVisible=true
        },
        // 通过递归的形式 展示角色下所有的三级权限的ID 并保存到defKeys数组中
        getLeafKeys(node,arr){
            // 如果当前节点不包含children属性，则属于三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item =>
            this.getLeafKeys(item,arr));
        },
        // 监听对话框关闭时 清空defKeys中所有ID
        setRightDialogClosed(){
            this.defKeys=[]
        },
        // 点击为角色添加权限
        async allotRights(){
            const keys=[
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr=keys.join(',')
            // console.log(keys);
            const { data:res } = await this.$http.post(`roles/${this.roleId}/rights`,{ rids:idStr })
            if(res.meta.status!==200){
                return this.$message.error('分配权限失败!')
            }
            this.$message.success('分配权限成功!')
            this.getRolesList()
            this.setRightDialogVisible=false
        }
    },
}
</script>
<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>